Billy Ray Cyrus to Justin Gaston: You're My Mini-Me!

Miley Cyrus was one lucky girl on Sunday night when her rumored 20-year-old beau Justin Gaston took to the stage and sang to her during her Sweet 16 bash at Disneyland in Anaheim, Calif.

“He’s here,” Miley said of Justin. “He’s celebrating with the rest of my friends, so that’ll be very nice.”

Even Miley’s dad, Billy Ray Cyrus, approves of Justin!

“He actually reminds me a lot of myself when I was 20 years old and I was living and searching for the dream,” Billy Ray told Access Hollywood. “He’s got a great heart and soul, and a lot of determination. I think that’s the true measure of a man, is when you measure his heart.”